ANVIL COVER
- Replaceable polyurethane sleeve for anvil cylinders
- Used in rotary die-cutters
- Provides a resilient cutting surface
- Ensures clean cuts and accurate scoring
- Protects die knives and corrugated board
ANVIL COVER
- Replaceable polyurethane sleeve for anvil cylinders
- Used in rotary die-cutters
- Provides a resilient cutting surface
- Ensures clean cuts and accurate scoring
- Protects die knives and corrugated board
An Anvil Cover (also called an anvil blanket, anvil pad, or lagging) is a replaceable polyurethane sleeve fitted around the anvil cylinder of a rotary die-cutter in the corrugated board industry.
Its purpose is to provide a resilient, precise cutting surface for the die knives, ensuring clean cuts and accurate scoring while protecting both the tooling and the board from damage.
Construction Features
Material
Specially formulated polyurethane for cut resistance, elasticity, and abrasion resistance.
Reinforcement
Internal fiberglass mesh/net to maintain dimensional accuracy despite temperature changes.
Joint Design
Precision jigsaw or tongue-and-groove joints for quick installation and secure fit.
Surface Properties
Engineered for energy return (rebound) to reduce impression pressure and extend tooling life.
Machine-Specific Fit
: Manufactured to match the length, circumference, and cylinder type of each die-cutter.
Hardness Control
Shore A hardness tailored to the board type and cutting profile.
Key Selection Factors
When choosing an anvil cover, consider:- Machine Compatibility – Exact dimensions and joint type for your rotary die-cutter.
- Board Type & Thickness – Heavier boards may require harder covers; lighter boards may need softer rebound.
- Cutting Rule Profile – Match hardness and rebound to the die’s knife height and profile.
- Production Volume & Speed – High-speed lines may need covers with superior heat and wear resistance.
- Environmental Conditions – Stability against temperature and humidity changes.
- Maintenance Capabilities – Whether your machine allows trimming/grinding to extend cover life.
- Supplier Quality – Proven track record, consistent tolerances, and technical support.
Key Selection Factors
When choosing an anvil cover, consider:
- Machine Compatibility – Exact dimensions and joint type for your rotary die-cutter.
- Board Type & Thickness – Heavier boards may require harder covers; lighter boards may need softer rebound.
- Cutting Rule Profile – Match hardness and rebound to the die’s knife height and profile.
- Production Volume & Speed – High-speed lines may need covers with superior heat and wear resistance.
- Environmental Conditions – Stability against temperature and humidity changes.
- Maintenance Capabilities – Whether your machine allows trimming/grinding to extend cover life.
- Supplier Quality – Proven track record, consistent tolerances, and technical support.
Common Types
Standard Polyurethane Covers
Balanced cut resistance and rebound for general use.
High-Cut-Resistance Covers
For heavy die-cutting jobs or abrasive board grades.
Soft-Compression Covers
For delicate scoring or lightweight boards.
Segmented Covers
Replace only worn sections without removing the entire cover.
Special Formulations
Tailored hardness or elasticity for specific board types or production speeds.
Maintenance & Care
To extend life and maintain cut quality:
- Regular Rotation – Shift cover position to distribute wear evenly.
- Trimming/Grinding – On machines with this feature, periodically resurface to maintain uniform thickness.
- Cleanliness – Remove dust, glue, and board debris to prevent uneven wear.
- Storage – Keep unused covers in a dry, shaded, temperature-stable environment; avoid humidity and direct sunlight.
- Seasoning Time – Install covers 2–3 weeks after production to allow polyurethane to stabilize.
- Inspection – Check for soft spots, cuts, or deformation at the lock section.
Maintenance & Care
To extend life and maintain cut quality:
- Regular Rotation – Shift cover position to distribute wear evenly.
- Trimming/Grinding – On machines with this feature, periodically resurface to maintain uniform thickness.
- Cleanliness – Remove dust, glue, and board debris to prevent uneven wear.
- Storage – Keep unused covers in a dry, shaded, temperature-stable environment; avoid humidity and direct sunlight.
- Seasoning Time – Install covers 2–3 weeks after production to allow polyurethane to stabilize.
- Inspection – Check for soft spots, cuts, or deformation at the lock section.
Key Parameters to Order
Parameter | Why It Matters | Typical Range / Note |
Hardness (Shore A) | Affects cut depth & rebound | ~80–95 Shore A |
Thickness | Determines usable life & cut stability | Machine-specific |
Rebound (Energy Return) | Reduces impression pressure | Higher rebound = less wear |
Cut Resistance | Prevents premature grooving | Material formulation dependent |
Dimensional Accuracy | Ensures fit & cut precision | ±0.1 mm tolerance |
Joint Type | Affects installation ease & seam quality | Jigsaw, tongue-and-groove |
Temperature Stability | Prevents swelling/shrinkage | Polyurethane + fiberglass net |
Machine Model & Cylinder Specs | Ensures correct fit | Length, circumference, cylinder type |